Smoking is a major cause of premature death. Each year, tobacco kills nearly 6 million people globally, including more than 600,000 non-smokers by secondhand smoke (SHS). During the past few decades, tobacco control has contributed prominently to international health, and the World Health Organization (WHO) Framework Convention on Tobacco Control (FCTC), the first international health treaty negotiated by WHO has propelled tobacco control into a new era. In order to determine the impact of and opinions on tobacco control policies, many countries around the world have carried out surveys on policies either implemented or under consideration. A number of surveys have assessed the impact of policies such as smoke-free laws, including the National Health and Nutrition Examination Survey (NHANES), the International Tobacco Control (lTC) Surveys and the Global Adult Tobacco Survey (GATS).